hello all,
Beginning to refit the electrical on a sailboat. Multiplus II 12/3000/120-50 to two battery banks. Reading the manual where it states
0-5 m*** 2x AWG 1/0
5-10m*** 2x AWG 2/0
1. So this is meters but is it round trip or just from the multiplus to the battery boxes.
2. If one battery box is under 5 meters away and the other is further than 5 meters, do I run 1/0 to the closest battery box and then 2/0 from that box to the second one?
Thank you for your time!
Drew
Your batteries need to be together. They are one bank. You cannot have two banks running one inverter.
The distance is round trip.
If they cannot be together, then the cable length from both needs to be equal for good current sharing between the two. It is also important for charging (volt drop over length and a bunch of other things). This is particularly critical since you are running 12v. That is alot of amps.
The easiest way is take them both to a bus bar to combine them and run to the inverter from there.
Long runs are problematic in general as Alexandra stated.
Your best bet (I think) is to find a location to join the two batteries and run equal length cables to each battery from there. Keep the cables as short as possible and oversize them. Then run cables from the joining location to the inverter.
